There’s a local sawmill here in Tucson called King Mesquite, they have it in even larger sizes, no lamination necessary. I did laminate the tops myself out of 8/4 beech. I sent the owner a cut list and they filled any voids you’d see on mesquite that size and planed it all s4s. I’ll end up smoothing them a bit with my LV LAS, but dimensioning mesquite by hand is a rough job. A worthy test for the new PMV-11 50 degree blade too . I dropped off the tops after i glued them up and got them mostly flat with my #5-1/2, and had them get them dead on parallel and even thickness. S6S I guess?